Not only that, but they would also use a lot of technology that Tesla/SpaceX now has a lot of experience in: battery, eletric engines and turbines, the metal for the ski pads, etc. There's a reason why he is making the plan completely free: he has a lot to benefit if this ever really happens.
I would love to see this happen though, and to see Elon become a trillionaire.
Shameless plug of the day :) So far it does not break too much of the laws of physics and is indeed workable.